SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/cdl-compressed-gas-cylinders

With no cylinder racks, how must compressed gas cylinders ride?

Upright on a flat floor.

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  1. Leaning against the side wall
  2. Loose so they can roll
  3. Held upright on a flat floor ✔

Why: If the truck has no racks, the cargo floor must be flat and the cylinders held upright, or kept in boxes that stop them from turning over.

Huh, didn't know that: Cylinders may lie down only if they are designed so the relief valve is in the vapor space.

The dad joke
Why are gas cylinders so polite? They always stand up straight.
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References

Answer: Held upright on a flat floor. If the truck has no racks, the cargo floor must be flat and the cylinders held upright, or kept in boxes that stop them from turning over.

  1. California Commercial Driver Handbook (DMV) www.dmv.ca.gov/portal/file/california-commercial-driver-handbook-pdf
    If your vehicle does not have racks to hold cylinders, the cargo space floor must be flat.
    Checked 2026-10-10.

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